1278002 has 12 divisors (see below), whose sum is σ = 2107518. Its totient is φ = 580800.

The previous prime is 1277993. The next prime is 1278007. The reversal of 1278002 is 2008721.

It can be written as a sum of positive squares in only one way, i.e., 1234321 + 43681 = 1111^2 + 209^2 .

It is a super-2 number, since 2×1278002² = 3266578224008, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2399 + ... + 2882.

2^1278002 is an apocalyptic number.

1278002 is a deficient number, since it is larger than the sum of its proper divisors (829516).

1278002 is a wasteful number, since it uses less digits than its factorization.

1278002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305 (or 5294 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1278002 is about 1130.4875054595. The cubic root of 1278002 is about 108.5201814272.

The spelling of 1278002 in words is "one million, two hundred seventy-eight thousand, two".